Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

Assignment history

Inventors

Xing Yang (Johns Hopkins University)
Sridhar Nimmagadda (Johns Hopkins University)
Steven Rowe (Johns Hopkins University)
Stephanie Slania (Johns Hopkins University)
Martin G. Pomper (Johns Hopkins University)

All inventors were affiliated with Johns Hopkins University at the time of filing.

Original assignee

Johns Hopkins University. Johns Hopkins University is a research institution and does not typically ship products embodying patent claims in a commercial sense. Their primary line of business is academic research, education, and healthcare. Johns Hopkins University is currently operating.

Assignment timeline

As of May 20, 2026, a search on the USPTO Assignment Center for patent US12115233 returns no recorded assignments. This typically indicates that the original assignee, Johns Hopkins University, still holds ownership of the patent.

Timeline diagram

timeline
    title Ownership of US 12115233
    2017 : Priority date
    2018 : PCT application filed
    2023 : US continuation filed
    2024 : Issued to Johns Hopkins University

NPE / troll-pattern signals

Shell-entity transfer — not present. There is no record of transfer from Johns Hopkins University to any other entity.
Known asserter in the chain — not present. The sole recorded owner is Johns Hopkins University, which is not a known patent asserter.
Repeat correspondent across the chain — not present. With no assignments, there is no chain to observe repeat correspondents.
Cascading transfers — not present. No assignments are recorded.
Pre-litigation transfer — not present. No assignments are recorded, and no litigation has been initiated by Johns Hopkins University involving this patent based on available information.
Bankruptcy fire-sale — not present. Johns Hopkins University is currently operating and has not filed for bankruptcy.
Privateering — not present. There is no indication of a transfer to an NPE on behalf of an operating company.
Defensive aggregator (anti-NPE) — not present. The patent is not currently assigned to a defensive aggregator.

Verdict

Insufficient data. As of the current date, the USPTO Assignment Center shows no recorded assignments for US patent 12115233. Therefore, there is no information in the assignment record to indicate any NPE or patent-troll patterns.

Verification search: https://assignmentcenter.uspto.gov/